Burmadinho dam collapse had left startling pictures.

Collapse of a dam in southern Brazil at an iron mine left more than 300 people dead or missing.

The images show the moment a muddy sludge engulfed the company canteen and neighbouring buildings in Brumadinho, in Minas Gerais state.

Investigation of the causes of the collapse is going on.

Vale SA owns the mine. It is second case at one of its mines for the last three years.

There have been five people arrested. They were Vale officials, whose responsibilities included dealing with environmental impact licences, Brazilian authorities reported.

Vale, the world’s biggest producer of iron ore and nickel, said it was co-operating with prosecutors.

The casualty toll as of Thursday evening was 110 confirmed dead and 238 missing.